package Scanner01;

import java.util.Scanner;

public class Scanner01 {
    public static  void main(String[] args) {
        Scanner sc= new Scanner(System.in);
        double a;
        System.out.println("请输入数据：");
        a= sc.nextDouble();
        System.out.println("输入的数据是：\n"+a);
    }
}
